Table 3.

Odds ratios with 95% Confidence Interval [CI] of latent class membership predictors and χ² tests of differences in 6-month abstinence rates among latent classes.^a

Covariates	Early Intermittent Smoker (11.5%)	Late Intermittent Smoker (6.5%)	Relapser (7.3%)	Cessation Failure (16.4%)
Panel A: Reference Group: Early Quitter (58.2%)
All Active Tx vs. Placebo	0.66 [0.48, 0.90]*	0.64 [0.43, 0.96]*	0.61 [0.42, 0.89]*	0.37 [0.29, 0.47]*
Patch+Loz vs. Other Active Tx	0.80 [0.61, 1.05]	0.78 [0.55, 1.10]	0.96 [0.71, 1.30]	0.52 [0.39, 0.68]*
Patch or Bup+Loz vs. Bup or loz	0.69 [0.51, 0.94]*	0.72 [0.49, 1.05]	0.70 [0.49, 1.02]	0.59 [0.45, 0.77]*
Patch vs. Bup+Loz	1.18 [0.95, 1.47]	0.82 [0.62, 1.09]	1.31 [1.00, 1.71]	0.93 [0.76, 1.13]
Bup vs. Loz	0.91 [0.74, 1.12]	0.77 [0.59, 1.00]	0.87 [0.67, 1.12]	0.97 [0.82, 1.16]
FTCD	1.10 [0.97, 1.25]	1.10 [0.94, 1.29]	1.42 [1.21, 1.66]*	1.32 [1.18, 1.48]*
Longest period abstinent in days	0.80 [0.70, 0.92]*	0.74 [0.61, 0.89]*	0.74 [0.63, 0.88]*	0.78 [0.69, 0.88]*
Number of past quit attempts	0.95 [0.83, 1.08]	1.08 [0.91, 1.27]	0.89 [0.77, 1.04]	0.81 [0.73, 0.91]*
Baseline Self-efficacy	1.03 [0.90, 1.18]	0.89 [0.76, 1.04]	1.10 [0.94, 1.30]	0.81 [0.73, 0.90]*
Baseline WSWS Sleep scale	1.17 [1.03, 1.32]*	1.08 [0.92, 1.26]	1.28 [1.10, 1.49]	1.12 [1.01, 1.26]*
Minority (1=Minority, 0=White)	1.29 [0.90, 1.84]	1.74 [1.17, 2.60]*	1.62 [1.11, 2.37]*	2.04 [1.55, 2.67]*
Intercept	0.20 [0.17, 0.23]*	0.10 [0.09, 0.12]*	0.11 [0.09, 0.13]*	0.23 [0.21, 0.27]*
Panel B: Reference Group: Cessation Failure (16.4%)
All Active Tx vs. Placebo	1.78 [1.28, 2.49]*	1.74 [1.15, 2.65]*	1.66 [1.12, 2.45]*
Patch+Loz vs. Other Active Tx	1.55 [1.09, 2.21]*	1.51 [0.99, 2.28]	1.85 [1.26, 2.71]*
Patch or Bup+Loz vs. Bup or loz	1.18 [0.82, 1.68]	1.21 [0.79, 1.87]	1.19 [0.79, 1.81]
Patch vs. Bup+Loz	1.27 [0.98, 1.66]	0.88 [0.64, 1.22]	1.41 [1.04, 1.92]*
Bup vs. Loz	0.93 [0.73, 1.18]	0.79 [0.59, 1.05]	0.89 [0.67, 1.18]
FTCD	0.83 [0.72, 0.97]*	0.83 [0.69, 1.00]	1.07 [0.90, 1.28]
Longest period abstinent in days	1.03 [0.87, 1.22]	0.95 [0.77, 1.17]	0.95 [0.78, 1.16]
Number of past quit attempts	1.16 [1.00, 1.35]	1.32 [1.10, 1.59]*	1.10 [0.93, 1.30]
Baseline Self-efficacy	1.27 [1.10, 1.48]*	1.09 [0.93, 1.29]	1.36 [1.14, 1.62]*
Baseline WSWS Sleep scale	1.04 [0.89, 1.20]	0.96 [0.80, 1.14]	1.14 [0.96, 1.35]
Minority (1=Minority, 0=White)	0.63 [0.43, 0.93]*	0.86 [0.56, 1.32]	0.80 [0.53, 1.20]
Intercept	0.84 [0.71, 1]	0.44 [0.36, 0.54]*	0.47 [0.39, 0.58]*
Panel C: Reference Group: Relapser (7.3%)
All Active Tx vs. Placebo	1.07 [0.69, 1.67]	1.05 [0.63, 1.76]
Patch+Loz vs. Other Active Tx	0.84 [0.57, 1.23]	0.81 [0.53, 1.26]
Patch or Bup+Loz vs. Bup or loz	0.99 [0.63, 1.54]	1.02 [0.61, 1.69]
Patch vs. Bup+Loz	0.90 [0.65, 1.25]	0.62 [0.43, 0.90]*
Bup vs. Loz	1.05 [0.77, 1.42]	0.89 [0.63, 1.25]
FTCD	0.78 [0.64, 0.94]*	0.78 [0.63, 0.96]*
Longest period abstinent in days	1.08 [0.88, 1.33]	0.99 [0.78, 1.26]
Number of past quit attempts	1.06 [0.88, 1.27]	1.21 [0.98, 1.49]
Baseline Self-efficacy	0.94 [0.77, 1.14]	0.81 [0.65, 0.99]*
Baseline WSWS Sleep scale	0.91 [0.76, 1.09]	0.84 [0.68, 1.03]
Minority (1=Minority, 0=White)	0.79 [0.50, 1.27]	1.07 [0.64, 1.78]
Intercept	1.77 [1.43, 2.19]*	0.93 [0.72, 1.19]

^aClass prevalances are slightly different in the conditional versus unconditional (Figure 1b) models;

^*p < 0.05;

Tx=Treatment; Patch=Nicotine patch; Loz=Nicotine lozenge; Bup=Bupropion SR; Patch+Loz=Combination nicotine patch and lozenge; Bup+Loz=Combination Bupropion SR and nicotine lozenge